问题 选择题

该图为黄河流域示意图。读图,回答问题。

小题1:黄河流域作为一个区域,其划分是依据是

A.单一指标

B.气候、地形等自然指标

C.行政区划

D.自然与人文的综合指标小题2:黄河流域

A.甲处最主要的环境问题是气候干旱

B.乙处环境问题产生的主要原因是泥沙大量沉积

C.丙处环境问题带来的主要危害是地质灾害频发

D.治理环境问题的主要措施是恢复地表植被

答案

小题1:A

小题2:D

题目分析:

小题1:河流流域是指河流的汇水区域,流域界线一般以山脊、山峰为界。反映其以单一指标为划分的主要依据。

小题2:图示甲位于我国青藏高原,地势高,气候寒冷,降水少,故主要的生态环境问题为土地荒漠化,A错误;乙处位于黄土高原,由于植被破坏严重导致水土流失严重,B错误;丙地区位于黄河下游,由于地上河危害,故洪涝之后多发,C错误;由于黄河流域环境问题产生的一大原因是植被的破坏,故恢复地表植被是治理整个流域环境问题的主要措施,D正确。。

点评:本题有一定难度,解答本题的关键是掌握我国的主要区域界线分布和我国区域生态环境问题的分布,并结合区域生态环境的形成原因和治理措施分析。

单项选择题 A3/A4型题
单项选择题

Government officials reported three new cases of mad cow, bringing the total so far this year to 99. Last year, France recorded just 31 cases of the mad cow disease. The rising numbers are in part (1) a new testing program that focuses on cows that are most (2) . That program has (3) 39 cases. But still 60 new cases were identified in the usual way, (4) were found in 1999. Many scientists (5) that this year, five years after safety precautions were (6) , the number of cases would be (7) .

The rise in cases has (8) some scientists to question whether the disease can be transmitted in ways not yet understood. Scientists are still (9) the disease, first recognized in cows in 1986.

It appears that it is not caused by a bacteria, virus or fungus, but (10) infectious particles called prion, perhaps (11) a virus or other agent. The disease kills cells in the brain, (12) it spongy and full of holes.

France has taken more steps to (13) safety than most European countries, (14) refusing to take English beef (15) the European Union. But some scientists believe that France has not been (16) in imposing the ban on feed that (17) animal pans.

Some French officials hope that the sudden interest in mad cow disease will mean that French consumers will become educated about it, thereby recognizing that French beef is actually (18) controlled. Every cow is given a passport at birth, and extensive information about its parentage and (19) it was raised must be (20) to any slaughterhouse. When a diseased animal is found, the entire herd is destroyed.

10()

A. stems from

B. developed in

C. grew out of

D. generated from